Viking Kristall

Notice: Undefined index: user in /home/httpd/vikingkristall/vikingkristall.com/public_html/shop_product.php on line 10

Fatal error: Uncaught TypeError: Argument 1 passed to Customer::getRetailerInfo() must be of the type string, null given, called in /home/httpd/vikingkristall/vikingkristall.com/public_html/shop_product.php on line 10 and defined in /home/httpd/vikingkristall/vikingkristall.com/public_html/classes/Customer.class.php:344
Stack trace:
#0 /home/httpd/vikingkristall/vikingkristall.com/public_html/shop_product.php(10): Customer->getRetailerInfo(NULL)
#1 /home/httpd/vikingkristall/vikingkristall.com/public_html/index.php(69): require_once('/home/httpd/vik...')
#2 {main}
thrown in /home/httpd/vikingkristall/vikingkristall.com/public_html/classes/Customer.class.php on line 344